Short answer — yes, you can upgrade to Windows 11 25H2, but it’s not urgent. 25H2 is an “enablement” / servicing update that mostly flips on features already present in 24H2 and is designed to be quick and low‑risk. If you want the absolute latest fixes and to reset the support lifecycle on your PC, go ahead; if your PC is stable on 24H2 you can also wait a few weeks for broad rollout and driver updates. (
windowscentral.com)
Below I’ll tell you:
- whether you should upgrade (short guidance),
- exactly how to download an official offline ISO from Microsoft,
- the safest, recommended way to install (in‑place vs clean), and
- a concise pre‑upgrade checklist and troubleshooting tips.
Should you upgrade now?
- If you want the newest supported Windows release and minimal downtime, upgrade — 25H2 is delivered as a small enablement package for 24H2 and typically installs quickly. (windowscentral.com)
- If you rely on third‑party security (Kaspersky), specialized drivers (e.g., NIC firmware), or custom tools, wait 1–2 weeks after the public release to allow vendors to push driver/AV updates — that reduces risk. (You already saw Kaspersky interactions earlier; it’s wise to check Kaspersky’s support notes/updates before upgrading.)
- Note: early benchmarks show 25H2 performs essentially the same as 24H2 (no real speed gains), so this is mostly about staying current / support windows rather than performance. (tomshardware.com)
How to get the official offline ISO (safe, official sources)
Use Microsoft’s official pages. Two supported paths:
A) If 25H2 is publicly available on Microsoft’s Download pages:
- Open Microsoft’s Windows 11 download page (Download Windows 11). Use the “Download Windows 11 Disk Image (ISO)” option or the Media Creation Tool to create media. This is the official Microsoft ISO. (If the page lists multiple editions, pick the edition that matches your license: Pro.) (tomshardware.com)
B) If 25H2 is only in Insider/Release Preview right now (typical during initial rollout):
- Sign in with a Microsoft account enrolled in the Windows Insider Program (Release Preview channel).
- Download the Windows 11 Insider ISO from the Windows Insider ISO page (official Microsoft Learn page explains mounting/using the ISO). Microsoft is publishing 25H2 ISOs on the Insider page when it’s in Release Preview. (windowscentral.com)
Step‑by‑step: download the ISO and do an in‑place upgrade (keep apps & files)
1) Back up (do not skip)
- Full file backup (external drive or cloud) and a system image if possible.
2) Check your current version and build:
- Run Win+R → winver (confirm you’re on 24H2).
3) Download the ISO from Microsoft:
- Official download page or Windows Insider ISO page (sign in if required). Save the ISO locally (≈6–7 GB). (windowscentral.com)
4) Verify integrity (optional but recommended):
- Get-FileHash -Path "C:\Path\to\Windows11_25H2.iso" -Algorithm SHA256
- Compare the hash with the value Microsoft supplies on the download page.
5) Mount the ISO and run setup.exe:
- Right‑click ISO → Mount. In the new drive, run setup.exe.
- Choose Keep personal files and apps (in‑place upgrade). Follow prompts and reboot when asked. Microsoft’s docs cover exactly these steps. (learn.microsoft.com)
If you prefer a bootable USB (for clean install or troubleshooting)
- Use Microsoft Media Creation Tool or Rufus to create a bootable USB (8 GB+). Microsoft describes creating media in its “Create Windows 11 installation media” section. Then boot the USB on target PC for a clean install or run setup.exe from the USB for an in‑place upgrade. (tomshardware.com)
Pre‑upgrade checklist (do these before running setup.exe)
- Full backup and a system image (external drive).
- Suspend BitLocker (if enabled) or record recovery key:
- Manage BitLocker > Suspend protection, or: manage-bde -protectors -disable C:.
- Sign out of/disable third‑party AV (Kaspersky): either fully exit or follow vendor instructions for upgrade compatibility. Uninstall only if vendor recommends. (You already had to adjust Kaspersky in this thread.)
- Update critical drivers (chipset, NIC, GPU)—download vendor installers now (motherboard, Realtek/TP‑Link driver for your 2.5Gb NIC).
- Free disk space: ensure >= 20–30 GB free on C: for safe upgrade.
- Note product activation: your Pro key remains valid; in-place upgrades keep activation.
- If you use Sandbox/Hyper‑V or special virtual drivers, close VMs and snapshot them.
- Create a restore point (or system image) and note your rollback plan.
If you want to test first (low risk)
- Create a VM (Hyper‑V / VirtualBox) and apply the ISO there first; or install on a secondary PC. That lets you see any compatibility issues before upgrading your main machine.
Troubleshooting / What to do if something fails
- If setup blocks due to compatibility (TPM/Secure Boot/CPU), check PC Health Check and BIOS settings (enable TPM 2.0 and Secure Boot if supported). Some people bypass checks (registry LabConfig), but that’s unsupported and not recommended for production machines. (techcommunity.microsoft.com)
- If Kaspersky or other software behaves oddly after the upgrade, check vendor support pages for updated builds certified for 25H2. Temporarily uninstall/reinstall if needed.
- If activation errors occur after edition change, run:
slmgr /dlv (to inspect) and slui 4 for phone activation if needed.
Quick checklist you can copy/paste now
- winver (confirm current build)
- Backup → external image or copy
- Download ISO: Download Windows 11 (or Insider ISO page) and save ISO. (tomshardware.com)
- Get-FileHash -Path "C:\Downloads\Windows11_25H2.iso" -Algorithm SHA256
- Mount ISO → run setup.exe → choose Keep personal files and apps
Final recommendations
- If you want the newest supported build and minimal fuss, upgrade — it’s safe for most users and is small/fast because it’s an enablement update. (windowscentral.com)
- If you depend on third‑party security software or custom drivers, wait briefly (a week or two) for vendor updates and then upgrade — that reduces helpdesk work. Also test in a VM or secondary PC if you can. (tomshardware.com)
If you’d like I can:
- Provide the exact Microsoft download link for the 25H2 ISO (I can fetch it and paste the download URL for your region), and show the exact steps you should click in the browser; or
- Walk you step‑by‑step live through mounting the ISO and doing the in‑place upgrade (I’ll list the prompts to expect); or
- Give the exact commands to suspend BitLocker, check TPM/Secure Boot, and verify the NIC and Kaspersky compatibility before you upgrade.
Which would you prefer?
