MacOS X 10.7.5 screen flickers in black and freezes for 2 minutes

Recently noticed a problem - in Finder, column view (this is important) if I select a pdf file (noticed only for pdf) screen flickers quickly several times in black color and the whole system freezes (except mouse cursor) for 2 minutes (I've measured with timer). After that, everything goes normally, file preview is displayed on the right side in Finder window as it is expected to be and file can be normally opened with Preview app.
Can anyone suggest on this? Where should I start looking to for more information (any logs)?
I have MBP late 2008 aluminium unibody with 4GB RAM, 2.4Ghz Core 2 Duo.

Hi peetonn,
Thanks for visiting Apple Support Communities!
You may find the information in these articles helpful for isolating and resolving the issue you're encountering:
Mac OS X: How to troubleshoot a software issue
http://support.apple.com/kb/ht1199
Isolating issues in Mac OS X
http://support.apple.com/kb/ts1388
If it comes to reinstalling OS X, this article is relevant for OS X 10.7 Lion:
OS X Lion: Reinstall Mac OS X
http://support.apple.com/kb/PH3878
Best,
Jeremy

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