I have been running a OEM version of Ultimate Vista 64 that required no key or activation. Everything was running perfectly until last night. I turned my computer on and I am now getting prompted saying my activation key is invalid and that I need to get a new one. My guess is that it installed some Windows Update that caught the bad key, I tried downloading a SLIC modded version of my bios and I get the same exact error. So I then tried to go through these steps I found elsewhere: 1) Open Internet Browser 2) Type %windir%\system32 into the browser address bar. 3) Find the file CMD.exe 4) Right-Click on CMD.exe and select 'Run as Administrator' 5) Type: net stop slsvc (it may ask you if you are sure, select yes) 6) Type: cd %windir%\ServiceProfiles\NetworkService\AppData\Ro aming\Microsoft\SoftwareLicensing (there is no free space at 'Roaming', it's a bug, cannot edit lol!) 7) Type: rename tokens.dat tokens.bar 8) Type: cd %windir%\system32 9) Type net start slsvc 10) Type: cscript slmgr.vbs -rilc (It may take a long time for this to complete, please be patient) 11) Reboot Twice I get to step 5 and it says "not enough quota is available to process this command". I do have a XP partition that I hardly use, but I can boot to it. What are my options at this point? Can this be fixed? Is there anyway I can re-install vista and keep all my configurations? I don't want to have to reinstall every game and application I already have setup.