Windows 7 Shortly freezes and comes back

So okay. During my usage of Windows Seven, I have found one very annoying problem which is freezing. It doesn't freeze for more then 2 seconds, it freezes and then it goes back to normal instantly but it gets very annoying. Because sometimes the freezing stays for like 2 seconds and the sound totally freezes up also it does a peeping sound like its stuck.... Also I have been reaching about this problem before posting here.. they are saying that it my be cpus or memory and and I know that is not my problem because I recently updated my PC with a new graphic card. Before i did that it wasn't freezing..
I updated from a radeon X800 ATI to a HD 4770 which is clearly its better and before I switched graphic cards it worked fine and now its not right now Please I really need a fix for this issue.

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Operating System: Windows 7
Language: English (Regional Setting: English)
System Manufacturer: System manufacturer
System Model: System Product Name
BIOS: BIOS Date: 10/17/07 09:57:40 Ver: 08.00.12
Processor: Intel(R) Core(TM)2 CPU 4400 @ 2.00GHz (2 CPUs), ~2.0GHz
Memory: 2048MB RAM
Available OS Memory: 2048MB RAM
Page File: 1310MB used, 2784MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 11
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Card name: ATI Radeon HD 4770
Manufacturer: ATI Technologies Inc.
Chip type: ATI display adapter (0x94B3)
DAC type: Internal DAC(400MHz)
Device Key: Enum\PCI\VEN_1002&DEV_94B3&SUBSYS_0D001002&REV_00
Display Memory: 1275 MB
Dedicated Memory: 508 MB
Shared Memory: 767 MB
Current Mode: 1680 x 1050 (32 bit) (59Hz)
Monitor Name: ACER AL2016W
Monitor Model: AL2016W
Monitor Id: ACRAD64
Native Mode: 1680 x 1050(p) (59.954Hz)
Output Type: HD15

are you sure you have installed the latest drivers?

Hi there,

I've got the same problem. Freezing from a couple of seconds up to 1-2 minutes. Firefox grays out, music (via winamp) still keeps playing until I try to interact.Interaction in general is not possible but minimizing windows. Bringing up a file browsing context freezes any application during that time.

I noticed this won't appear as often if i unmount my True crypt partitions. Seems to hapen more often while doing a lot of stuff that requires my hard disc, like watching videos while playing games.

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System Information
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Time of this report: 11/2/2009, 13:47:39
Machine name: NONE
Operating System: Windows 7 Professional 64-bit (6.1, Build 7600) (7600.win7_rtm.090713-1255)
Language: German (Regional Setting: German)
System Manufacturer: Gigabyte Technology Co., Ltd.
System Model: P55-UD3
BIOS: Award Modular BIOS v6.00PG
Processor: Intel(R) Core(TM) i5 CPU 750 @ 2.67GHz (4 CPUs), ~2.8GHz
Memory: 4096MB RAM
Available OS Memory: 4092MB RAM
Page File: 1895MB used, 6285MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 11
DX Setup Parameters: Not found
User DPI Setting: Using System DPI
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
DxDiag Version: 6.01.7600.16385 32bit Unicode

I'll try different drivers these days and try to get rid of as much 32Bit software as I'm able to. I saw some cause problems in the event manager, like unity3D, maybe that will help too.