hang/freeze with weird mouse cursor issue

Hello all, I am having a hang/freeze issue with my custom build. It occurs intermittently; seems like it does it one day and not the next. The symptoms:

• mouse cursor seems to get stuck in certain cursor shapes. By this I mean if I mouse over a text field the cursor might go to the "I" shaped text cursor and stay that way, even after the mouse leaves the field; or if I mouse over a hyperlink the cursor might turn into the pointing hand and stay that way, even after the mouse moves away
• I sometimes get hangs that last from 5 to 30 seconds where the mouse will not move and nothing is happening on the screen. I have not noticed this in games, mainly when browsing the internet or moving files/folders around in explorer
• probably unrelated, but in the name of completeness: I am having a lot of crashes (of the game) in Starcraft 2. It seems like around half the time when I try to start the game, it fails to launch, and I can't alt out then back in without it crashing, and it crashes at other times as well. Have tried reinstalling with no success

So far I haven't had any system crashes or blue screens, but a few times the hang has lasted so long that I just did a hard reset. Have used memtest to check the RAM, everything came back good there. I am about to run a checkdisk on my OS drive as well. Happy to provide any additional information that might help.


Thanks for reading!

Microsoft Comfort Optical Mouse 3000

this thread was originally in the BSOD forum but it got moved additionally I have been using this mouse for years without seeing this problem