1. Google this and do the change -> DISABLE FLASH HARDWARE ACCELERATION.
Sorry if I don't explain why here but it's widely discussed why and your first thing to change when you hear your story.
2. CANNED AIR TIME. Read http://forums.cnet.com/7723-6122_102-569818/getting-ready-to/?tag=contentBody;threadListing and consider it may be time.
Hope this helps,
Hi, My acer aspire 5532 on windows7 platform, is freezing while working for 2-3 minutes with just Grrr sound. During this time, I can not do any operation on laptop like moving mouse or clong windows. After 2-3 mins, it recovers on its own. This is happening daily three to four times and mainly happening while watcing streamed content. Please provide some resolution for the same. I have tried updating my sound drivers from acer site, but no luck. Thanks in advance...