Installed Windows7 via Bootcamp --> Mac Os messed up

I installed windows 7 on my i5 MBP via Bootcamp two days ago. Before I did that everything was running great in Mac Os x.
But from the moment I had Windows 7 installed, Mac Os X became almost unusable. It crashes ALL THE TIME.

Just some examples that happened just now:
I use two programs at the same time --> both programs crash
Mail is downloading a new email while I'm using safari --> safari crashes
I try to send a file to someone in Adium --> Adium crashes + Finder crashes

By crashing I mean that the multicolored spinningwheel appears for a long time. So they dont exactly crash but it takes like 3 minutes until I can use them again so that its easier to just restart the program.

In the last two days I also had to restart the whole computer at least 4 times because nothing was working anymore.

At the time the spinningwheel apears cpu usage is always way below 100% and theres also always a lot of free ram available. So I really don't understand why this is happening.


Have you guys got any ideas what could be the problem and how to fix it (if possible without reinstalling mac os).

Could something have gone wrong during partitioning the hdd?
Oh, and I didn't install any windows7 drivers yet since I haven't got my mac os cd with me, but I suppose this cannot cause these problems!?

Thanks for your help and sorry for my poor english

 

Thanks a lot, diablo!
This did help a lot. I'll now have to wait and see if it solved the problem completely..