I believe that the problems with your computer are due to the K2 - KeyAuditor/KeyServer" software from Sassafras Software. However, to narrow the cause of your computer problems even further, I provided some optional fixes for you to look at.
You may want to print out these instructions or save them as a text file with "Notepad" to your desktop because we will be restarting into Safe Mode later on in the fix and you might not be able to access the Internet.
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Run HijackThis and click "Scan." Place checks next to the following entry/entries (if they exist):
Optional Fixes
Dear Eneoecu, the following lines are optional fixes to stop unnecessary programs from running on startup, which may increase computer system performance. I highly recommend you to fix these items:
Auto-detect and play a DVD when using a Creative Soundblaster Audigy2 soundcard. Uses about 2.2 MB of memory. Disable it by heading to the MediaSource DVD Audio Player, selecting Tools, then uncheck the Auto Start box. It should not start up automatically again. If you use this feature then don't fix this line.
O4 - HKLM\..\Run: [CTDVDDet] C:\Program Files\Creative\SBAudigy2\DVDAudio\CTDVDDet.EXE
Updreg.exe - Reminder to register Creative Labs SoundBlaster Live! cards. If you want this feature then don't fix this line.
O4 - HKLM\..\Run: [UpdReg] C:\WINDOWS\UpdReg.EXE
qttask.exe - This is is a task tray icon which is used as a shortcut to a number of QuickTime related features. You really don't need this in your system tray. It is safe to remove this from your startup. QuickTime's most common purpose is for watching movies commonly in the .mov format. Please fix this line, because this program can be run other than in startup and this will increase the performance of your computer.
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
CTEaxSpl.exe - Splash screen with sound on every boot up. Installed with a Sound Blaster Audigy soundcard. If you want this feature then don't fix this line.
O4 - HKLM\..\Run: [CTStartup] "C:\PROGRA~1\Creative\SPLASH~1\CTEaxSpl.EXE" /run
hpcmpmgr.exe - Checks the internet for updated drivers/utilities for your HP product - update manually. Disabling will remove the error "Windows can\'t shutdown the computer because hpcmpmgr.exe can\'t be ended". Please fix this line, because this program can be run other than in startup and this will increase the performance of your computer.
O4 - HKLM\..\Run: [HP Component Manager] "C:\Program Files\HP\hpcoretech\hpcmpmgr.exe"
Atiptaxx.exe - Control panel for the ATI series of video cards allowing access to such features as display resolution, colour depth, etc. Available via Start -> Settings -> Control Panel -> Display. Some users may need it if they have optimised their settings. Please fix this line, because this program can be run other than in startup and this will increase the performance of your computer.
O4 - HKLM\..\Run: [ATIPTA] C:\Program Files\ATI Technologies\ATI Control Panel\atiptaxx.exe
HPWuSchd2.exe - HP software updates. If a shortcut doesn't exist, create your own and run it manually. Please fix this line, because this program can be run other than in startup and this will increase the performance of your computer. If you want this feature then don't fix this line.
O4 - HKLM\..\Run: [HP Software Update] C:\Program Files\HP\HP Software Update\HPWuSchd2.exe
realsched.exe - The Real Player automatic update utility. It has no real functional purpose. I would certainly stop this from running on startup. To disable "tkbell.exe" in the new version (1) Start RealOne Player (2) Tools -> Preferences (3) Automatic services in the Categories pane (4) Uncheck all options and then OK. In addition, see this important link: http://www.help2go.c...article&sid=211. If you want this feature then don't fix this line.
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Common Files\Real\Update_OB\realsched.exe" -osboot
aim.exe - AOL Instant Messenger. If connected to the internet, automatically runs up AIM. Convenience more than anything. Available via Start -> Programs. Please fix this line, because this program can be run other than in startup and this will increase the performance of your computer.
O4 - HKCU\..\Run: [AIM] C:\Program Files\AIM\aim.exe -cnetwait.odl
steam.exe - Valve Software's STEAM broadband game client. Steam is Valve's new way of getting games into your hands ASAP. Games like Half-Life, Counter-Strike, and Counter-Strike: Condition Zero are all being made available through Steam. Steam games are automatically kept up-to-date with the latest content and revisions. Steam also includes an instant-message client which even works while you're in-game. Can be started manually. Please fix this line, because this program can be run other than in startup and this will increase the performance of your computer.
O4 - HKCU\..\Run: [Steam] "c:\progra~1\valve\steam\steam.exe" -silent
Adobe Gamma Loader.exe - Adjusts monitor colours across all programs, including Photoshop. It is needed by some graphics professionals who want their monitor calibrated. Most home users will not need it. If you want this feature then don't fix this line.
O4 - Global Startup: Adobe Gamma Loader.lnk = C:\Program Files\Common Files\Adobe\Calibration\Adobe Gamma Loader.exe
Osa9.exe - Application which launches common MS Office components to help speed up the launch of Office programs. It's somewhat of a resource hog, and some users claim there's no difference with or without it but it usually isn't required - Note: if you make use of the Microsoft Office Shortcut Bar outside an office program this application will need to be enabled for it to show. If you want this feature then don't fix this line.
O4 - Global Startup: Microsoft Office.lnk = C:\Program Files\Microsoft Office\Office\OSA9.EXE
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Close all browser and other windows except for HijackThis, and click "Fix Checked" button to finish the repair. Close the HijackThis application.
Restart your computer and post a new HiJackThis log.
In addition, let me know in detail how your computer system is running after performing the above steps.