I've been trying to install an update to a new Quicken program. I've worked with Quicken support till there is nothing left to try on that end, they gave me new copies of everything to make sure nothing was corrupt. The software installs with no problem. The update puts several .tmp files in C:/, which I'm told Windows 8.1 isn't suppose to allow. When the update runs it fails with the following error: ----- Processing Patch File ----- Creating New System using Temporary Files Patching: Qsapi\qsapi_plan.DAT .......... Applying ADD File Patch for 'Qsapi\qsapi_plan.DAT' Adding New File error ept0018: RTPatch error ept0018: Failure Opening New File: PATCH was unable to open the named file. It was attempting to open this file to create a file for the updated version of the system. This can be caused by a disk or network error or if a directory exists b Failure Opening New File: C:\QuiC0AC.tmp\qsapi_plan.DAT RTPatchApply32 returned 18 ERROR: Error occurred applying patch to Quicken directory. Unloading RTPatch Engine. Deleting temporary directories... Deleting directory C:\QuiC0AD.tmp : Failed Deleting directory C:\QuiC0AE.tmp : Failed Deleting directory C:\QuiC0AC.tmp : Failed Not Rebasing DLLS Displaying Wizard 5 UPDATE FAILURE REASON: ERROR: One or more error(s) occurred with the patching engine, or patch data files. I was told to verify the following settings and did so. Environment variables - Under variable - TMP and TEMP are set to %USERPROFILE%\AppData\Local\Temp System variables - TMP and TEMP should be set to %SystemRoot%\TEMP I managed to get the tmp files deleted, not exactly easy, but it didn't help. I created a new Windows user account and installed the software and update, it failed again. I installed the software and update on my laptop with Windows 10 with no problem, so it appears to be a problem with my desktop with Windows 8.1. I've used Quicken for several years on this same computer with no problems installing, upgrading or updating. I'm not one to change any kind of settings on my computer, everything is pretty much default. Quicken support referred me to the win8forum, that forum has no activity and I got no answer. I tried answers.microsoft.com who responded fairly quickly but they said "This is not a Windows Issue, this is a known issue with Quicken please go to https://www.accountantforums.com/" So here I am and after much searching I found one post that indicated this is an OS problem (which is what I thought from the error). Desperately looking for direction here, any help would be appreciated.