1080p, 720p, avi, mkv playbacks quality very poor. videos not sharp & clear last week was

[idata]

hi please some one help me to solve following problem about HD graphics

problem: 1080p, 720p, avi, mkv video playbacks quality are very poor. not sharp and clear as last week was. why its going on? ? ?

note: i have already re-install my oparating system.

System Information

------------------Time of this report: 8/31/2010, 15:50:20Machine name: M-PC

Operating System: Windows 7 Ultimate 32-bit (6.1, Build 7600) (7600.win7_gdr.100618-1621)

Language: English (Regional Setting: English)

System Manufacturer: INTEL_System Model: DH55HC__BIOS: BIOS Date: 09/23/09 11:58:43 Ver: 08.00.10

Processor: Intel(R) Core(TM) i3 CPU 530 @ 2.93GHz (4 CPUs), ~2.9GHz

memory: 2048MB RAMAvailable OS Memory: 1910MB RAM Page File: 1156MB used, 2662MB available Windows Dir: C:\Windows DirectX Version: DirectX 11DX 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

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DxDiag Notes------------ Display Tab 1: No problems found. Sound Tab 1: No problems found. Sound Tab 2: No problems found. Input Tab: No problems found.

--------------------

DirectX Debug Levels--------------------Direct3D: 0/4 (retail)DirectDraw: 0/4 (retail)DirectInput: 0/5 (retail)DirectMusic: 0/5 (retail)DirectPlay: 0/9 (retail)DirectSound: 0/5 (retail)DirectShow: 0/6 (retail)

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Display Devices--------------- Card name: Intel(R) HD Graphics Manufacturer: Intel Corporation Chip type: Intel(R) HD Graphics (Core i3) DAC type: Internal Device Key: Enum\PCI\VEN_8086&DEV_0042&SUBSYS_00378086&REV_12 Display Memory: 762 MB Dedicated Memory: 64 MB Shared Memory: 698 MB Current Mode: 1920 x 1080 (32 bit) (60Hz) Monitor Name: Generic PnP Monitor Monitor Model: ASUS MS228 Monitor Id: ACI22F7 Native Mode: 1920 x 1080(p) (60.000Hz) Output Type: DVI Driver Name: igdumdx32.dll,igd10umd32.dllDriver File Version: 8.15.0010.2189 (English) Driver Version: 8.15.10.2189 DDI Version: 10 Driver Model: WDDM 1.1 Driver Attributes: Final Retail Driver Date/Size: 7/29/2010 04:58:10, 571904 bytes WHQL Logo'd: Yes WHQL Date Stamp: Device Identifier: {D7B78E66-4302-11CF-BBEB-3D20B2C2C535} Vendor ID: 0x8086 Device ID: 0x0042 SubSys ID: 0x00378086 Revision ID: 0x0012 Driver Strong Name: oem25.inf:Intel.Mfg:iILKD0:8.15.10.2189:pci\ven_8086&dev_0042 Rank Of Driver: 00E62001 Video Accel: ModeMPEG2_A ModeMPEG2_C ModeWMV9_B ModeWMV9_C ModeVC1_B ModeVC1_C