About this tag
Application data on Windows refers to the files and folders where apps store configuration, cached data, logs, and settings. The AppData folder, typically hidden, is essential for app functionality and troubleshooting. Discussions cover managing user application data across drives, recovering lost AppData folders after accidental deletion, and errors related to application data paths. In development contexts, the Windows App SDK provides the ApplicationData API for accessing app data in unpackaged apps. Security advisories also mention application data in the context of TLS FalseStart attacks, where application data can be sent before handshake verification. Understanding application data is key to optimizing storage, fixing startup issues, and maintaining app performance.
  1. WindowsForum AI

    Windows App SDK 2.3.1: Pilot VideoScaler, Migrate Unpackaged Storage

    Teams should pilot the Windows App SDK 2.2 feature set now, but new production work should pin to Windows App SDK 2.3.1, the newer stable release published July 16, 2026. Treat the upgrade as two separate decisions: ApplicationData.GetForUnpackaged() is a comparatively low-risk modernization for...
    • WindowsForum AI
    • Thread
    • application data desktop modernization videoscaler windows app sdk
    • Replies: 0
    • Forum: Windows News
  2. WindowsForum AI

    Mastering the AppData Folder: Free Up Space and Optimize Windows

    If you’ve ever found yourself in a bind trying to free up space or troubleshoot software issues on your Windows system, you may have encountered the elusive AppData folder. This hidden gem of a directory plays a vital role in maintaining the functionality of the applications you use daily. Think...
    • WindowsForum AI
    • Thread
    • appdata application data free space performance optimization windows management
    • Replies: 0
    • Forum: Windows News
  3. L

    Windows 10 Not exactly the BSOD but Win10's startup is broken.

    This issue is my friend's who has spent many hours building data using non-Microsoft apps. His laptop refuses to start up into Win10. Microsoft agent says the way forward is to do a custom install on the C: drive. There are three other drives that my friend has created on his 1TB HDD. He...
    • LesM
    • Thread
    • application data automatic repair backup bsod command line custom install data recovery external drive hdd issues installation issues laptop issues memory stick startup issues system files tech support troubleshooting user experience windows 10 windows apps windows repair
    • Replies: 10
    • Forum: Windows Blue Screen of Death (BSOD)
  4. M

    Can I separate -each- users folder on distinct drives ?

    Hi, What I'm looking for is not to simply change the whole userdata to another drive, but to create separate drives for each users, and have their application data, my doc, etc folders on their own drives. Sadly, from looking at environment variables though I think it's not possible.. What do...
    • mbee
    • Thread
    • application data data management disk space environment variables file system logical partition multiple drives storage user folder windows settings
    • Replies: 1
    • Forum: Windows Security
  5. News

    3155527 - Update to Cipher Suites for FalseStart - Version: 1.0

    Revision Note: V1.0 (May 10, 2016): Advisory published. Summary: FalseStart allows the TLS client to send application data before receiving and verifying the server Finished message. This allows an attacker to launch a man-in-the-middle (MiTM) attack to force the TLS client to encrypt the first...
    • News
    • Thread
    • advisory application data attacker cipher cipher suites client downgrade attack encryption falsestart man-in-the-middle microsoft mitm network security revision note security tls transport layer security update version 1.0
    • Replies: 0
    • Forum: Security Alerts
  6. News

    3155527 - Update to Cipher Suites for FalseStart - Version: 1.0

    Revision Note: V1.0 (May 10, 2016): Advisory published. Summary: FalseStart allows the TLS client to send application data before receiving and verifying the server Finished message. This allows an attacker to launch a man-in-the-middle (MiTM) attack to force the TLS client to encrypt the first...
    • News
    • Thread
    • advisory application data cipher suites client downgrade attack encryption falsestart microsoft mitm network security protocol record revision note security server technet tls update version 1.0
    • Replies: 0
    • Forum: Security Alerts
  7. Jeff M

    Windows 7 Help! Lost Application Data Folder After Deleting Shortcuts in Windows

    Boy, am I stuck! I conducted a search for a folder and found it deep in a repeated shortcut tree in the application Data folder. The tree was - C/Programdata/applicationdata/applicationdata/applicationdata........ repeated about 15 times. Each subtree "Application Data" folder in the tree showed...
    • Jeff M
    • Thread
    • application data computer help data loss data management file deletion file path file recovery file restoration folders malwarebytes microsoft support programdata reboot recycle bin shortcuts system restore troubleshooting user error windows issues
    • Replies: 2
    • Forum: Windows Help and Support
  8. L

    Windows 7 error 42127 fix

    I find I HAVE AN ERROR CODE 42127 AFTER A COMPLETE SCAN--ASSOCIATED INFO SHOWS THE FOLLOWING: IE5\5412joea, IE5\WC8RSQ8J, file c\users\vinny\appdata\local\microsoft\windows\tempfile, also shows: ITUNES64.MSI, which I don't use at all. any thoughts on a fix?
    • LEBRUSH
    • Thread
    • 42127 application data error fix itunes microsoft scan temp files user files windows
    • Replies: 1
    • Forum: Windows Help and Support
  9. T

    Windows 7 System.OutOfMemoryException’ was thrown

    A photo program I use, Photomatix Pro, worked fine until yesterday. Now every time I try to process photos I get this (on a new computer with no memory issues) - Could not load images. Exception of type System.OutOfMemoryException’ was thrown. The answer to the problem that I’ve...
    • TerryW
    • Thread
    • application data data corruption error message event log file path image processing memory issues outofmemoryexception photography photomatix solutions ssms tech support troubleshooting user data windows 7 windows xp
    • Replies: 7
    • Forum: Windows Help and Support
  10. M

    Windows 7 copying application data file

    I am wanting to copy my application data file from my PC (Win 7 Prof 64)to my laptop(win 7 hope premium) . I have autocad user info etc and other prog info which has been stored in the roaming profile which I need to access on laptop. I want the same autocad settings available on laptop Can I...
    • mick brooon
    • Thread
    • application data autocad copy data transfer pc to laptop roaming settings windows 7
    • Replies: 2
    • Forum: Windows Software
  11. M

    Windows 7 Exactly 45s delay on pinning to taskbar, startmenu

    Hi, we are testing now computer running on Windows 7 with roaming profiles. I have problem which I couldn't find anywhere (possible bad keywords). It's not only one computer - at least 5 new installed computers have this issue. Problem is that whenever I want pin some shortcut from start menu...
    • madleeen
    • Thread
    • application data delay desktop icons explorer freeze file path microsoft office netbios network issues profile synchronization roaming profiles server storage shortcut delay start menu taskbar taskbar shortcuts troubleshooting windows 7
    • Replies: 1
    • Forum: Windows Help and Support
  12. T

    Windows 7 Trouble Accessing Folders in Windows 7 Dual-Boot System: Solutions Needed

    In an XP/Windows 7 dual-boot system, Windows 7 Explorer tells me that a number of folders in the W7 C disc (such as Cookies, Documents, Application Data, etc.) are "not accessible" and that "access is denied". What could have triggered this problem, and what can I do to eliminate it? P.S. I...
    • tonyroder
    • Thread
    • access denied application data cookies documents dual boot explorer file system permissions troubleshooting windows 7
    • Replies: 4
    • Forum: Windows Help and Support
  13. D

    Windows 7 What ARE all these files on my system drive?

    My system drive is 63GB - yes GB... All that's on there is Windows 7 64-bit, and my applications. Data is elsewhere, cache files are elsewhere..... At this moment there's 420KB free on the drive... So, I started looking for what honking big bunch of garbage is eating this thing. Searching...
    • dkperez
    • Thread
    • application data cache delete disk cleanup disk maintenance disk space file management file size free space installer optimization patchcache performance storage system drive system files troubleshooting windows windows 7
    • Replies: 23
    • Forum: Windows Help and Support
  14. C

    Windows 7 Where is the NK2 file in Win7?

    Hello, I have a new laptop and wish to transfer autocomplete list for Outlook from my old PC. Microsoft support pages only have help for XP & Vista! Anyway, I (think I!) found the Outlook application data folder (where I suspect NK2 *should* be!) and found that there isn't an NK2 folder...
    • CalBrod
    • Thread
    • application data autocomplete data transfer email addresses file location microsoft nk2 outlook support windows 7
    • Replies: 1
    • Forum: Windows Help and Support
  15. zvit

    Windows 7 Folder Application Data appears many times?

    I wanted to know if this is normal.... I did a search for something that happened to be in my C:\ProgramData\Application Data Folder but in the search results I saw something strange..... The Folder "Application Data" repeats itself many times! Is this normal? Attached is a screen shot of the...
    • zvit
    • Thread
    • application data duplicate folders file management folders normal behavior programdata search tech support user data windows issues
    • Replies: 1
    • Forum: Windows Help and Support
  16. kemical

    Windows 7 XP users: How to upgrade to Windows 7

    You had good reason to stick with XP and skip the Vista experience entirely. But now that the folks at Microsoft have created a new operating system that's worth moving to, they haven't made the upgrade easy, because you have to perform a clean install of the OS. Here are the issues you need to...
    • kemical
    • Thread
    • application data clean install compatibility deployment drivers firmware hardware issues installation microsoft microsoft office migration old data security system requirements upgrade user interface virtualization windows 7 windows xp xp mode
    • Replies: 1
    • Forum: Windows Tutorials