Windows 7 laptop stuttering

Hi experts,

Need some advice on this please.

I have a HP ProBook Windows 7 Pro (64bit) 4GB RAM laptop. Its less than 6 months old so kind of newish. In past few weeks the system has been stuttering randomly throughout the day, usually "pause" for a second then recover and work fine. No particular pattern and don't seem to be related to what I am doing with it. (I don't play resource draining video game).

The symptom includes :-

1. non responsive mouse (also happens to the mouse pad).
2. non responsive key-strokes (when typing the letters don't appear until half a second later).
3. when playing video (inc Youtube) it stutters regularly, usually within 5 secs interval. Sometimes the picture freezes but sound still playing, sometime its other way round, sometime everything freezes for a second or so. Imagine you sit and watch a 90 minutes movie....... :( Watching the same video on my other XP is fine.

I have so far defrag and cleanup but that didn't help. I read a lot of posts re this but nothing seems to work. I have the latest windows updates installed. If it was a driver issue what driver should I look at/reinstall?

Any more idea where shall I look at? Thank You.
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ormerodrutterAsked:
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rindiConnect With a Mentor Commented:
The UBCD isn't complicated. You have a menu and from that you can select what you want. The tests on the UBCD are far better than the HP tests.
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rindiCommented:
There are many things that can cause this. First you could test your RAM and HD using memtest86+ and the HD manufacturer's diagnostic utility. You'll find both on the UBCD:

http://ultimatebootcd.com
http://pharry.org/data/ubcd523.iso

If those tools find any problem, make use of your warranty.

If not, then scan the system for malware using malwarebytes. Also use msconfig to remove any unnecessary things from auto-starting. Also uninstall any uneeded software:

http://malwarebytes.org
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ormerodrutterAuthor Commented:
I suspect it is down to a driver but just don't know which one.
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rindiCommented:
The description of your issue points more to what I have already suggested. Did you do as I said?
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ormerodrutterAuthor Commented:
I have bootup with the UBCD CD but that is a bit complicated. So I reboot and went into the Diagnoistic mode and ran the HP tests and they seems OK (all passed).

Haven't check for virus and malware yet.
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ormerodrutterAuthor Commented:
Checked and removed some Adware (in Safe mode) but that didn't resolve problem.

I removed the HP Power Management thing (as suggested from another article) and it seems to resolve the video playback issue but key-strokes are still lagging.
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ormerodrutterAuthor Commented:
I believe it is a hard drive problem so will bring to workshop and check out.

Thx for your idea.
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