Everything is slower and nothing works after restart

[hasy]

Hi,yesterday i installed quicktime for team fortress 2 and it required a restart.
After the logo appeared it remained on black screen for 1-2 min then another 1-2 min on 'Welcome' after that i got a bunch of windows about programs that crashed,my wifi adapter doesn't work,everything doesn't work.
I tried system restore but nothing changed
I'm having this problem for a long time,this is my 3rd installation and it keeps appearing.

 

[marsmimar]

Hello hasy and welcome to Seven Forums.

Make sure you've removed all traces of Quicktime and Team Fortress 2 from your computer. If they are no longer showing in Control Panel > Programs and Features you might want to try Revo Uninstaller. It has a 30 day free trial. Used the forced uninstall option.

Revo Uninstaller Pro - Uninstall Software, Remove Programs easily, Forced Uninstall

Once these programs are removed, see if your computer works the way it should. If it doesn't, you may have damaged or corrupt system files. Try running a system file checker scan from an elevated command prompt (option two, this tutorial.) If problems are found, run the scan 3 times rebooting in between each scan.

http://www.sevenforums.com/tutorials/1538-sfc-scannow-command-system-file-checker.html

Please post back if any of this helped or not.

 

[gregrocker]

In addition you may need to work through these Troubleshooting Steps for Windows 7