This started just today, sometimes a message pops up saying that an application cannot be started, this is the error log. (Note: I had to make remove the links from the log to post this.) PLATFORM VERSION INFO Windows : 6.1.7601.65536 (Win32NT) Common Language Runtime : 4.0.30319.42000 System.Deployment.dll : 22.214.171.124 built by: NETFXREL2 clr.dll : 126.96.36.199 built by: NETFXREL2 dfdll.dll : 188.8.131.52 built by: NETFXREL2 SOURCES Deployment url : (This was a link to something called Bidswitch, which my computer has never downloaded at all.) ERROR SUMMARY Below is a summary of the errors, details of these errors are listed later in the log. * Activation of (Bidswitch.) resulted in exception. Following failure messages were detected: + Access to the path 'C:\Users\(myusername)\AppData\Local\Temp\Deployment' is denied. COMPONENT STORE TRANSACTION FAILURE SUMMARY No transaction error was detected. WARNINGS There were no warnings during this operation. OPERATION PROGRESS STATUS * [9/29/2016 7:53:59 PM] : Activation of (Bidswitch) has started. ERROR DETAILS Following errors were detected during this operation. * [9/29/2016 7:53:59 PM] System.UnauthorizedAccessException - Access to the path 'C:\Users\pinamp\AppData\Local\Temp\Deployment' is denied. - Source: mscorlib - Stack trace: at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath) at System.IO.Directory.InternalCreateDirectory(String fullPath, String path, Object dirSecurityObj, Boolean checkHost) at System.IO.Directory.InternalCreateDirectoryHelper(String path, Boolean checkHost) at System.Deployment.Application.SubscriptionStore..ctor(String deployPath, String tempPath, ComponentStoreType storeType) at System.Deployment.Application.SubscriptionStore.get_CurrentUser() at System.Deployment.Application.ApplicationActivator.PerformDeploymentActivation(Uri activationUri, Boolean isShortcut, String textualSubId, String deploymentProviderUrlFromExtension, BrowserSettings browserSettings, String& errorPageUrl) at System.Deployment.Application.ApplicationActivator.ActivateDeploymentWorker(Object state) COMPONENT STORE TRANSACTION DETAILS No transaction information is available. If anyone knows what could be causing this error, do let me know.