So I'm assuming it's stuck at that point?
No experience with Counter-Strike really, but personally I would try the following:
1) Disable Anti-Virus (might aswell scan your PC for Spyware/Malware, just in case)
2) Steam: right-click Counter-Strike for 'Properties' -> 'Local Files' -> 'Verify integrity of game cache'
3) Re-install (Steam and) Counter-Strike