i am having a problem in my desktop whenever i update my display adapter from VGA to intel r g41 express chipset, after restarting the pc it GETS black screen and hangs for a minute then RESTART again.I dont know what to do     
OS Name   Microsoft Windows 7 Ultimate
Version   6.1.7600 Build 7600
Other OS Description    Not Available
OS Manufacturer   Microsoft Corporation
System Name   ABBU-PC
System Manufacturer   Intel
System MODEL   DG41WV
System Type   X86-based PC
Processor   Intel(R) Core(TM)2 Duo CPU     E7500  2.93GHz, 2926 Mhz, 2 Core(s), 2 LOGICAL Processor(s)
BIOS Version/Date   Intel Corp. WVG4110H.86A.0007.2010.0302.1843, 02-Mar-10
SMBIOS Version   2.4
Windows Directory   C:\Windows
System Directory   C:\Windows\system32
Boot Device   \Device\HarddiskVolume1
Locale   UNITED States
Hardware Abstraction Layer   Version = "6.1.7600.16385"
User Name   Abbu-PC\Abbu
Time Zone   India Standard Time
Installed Physical Memory (RAM)   4.00 GB
Total Physical Memory   3.96 GB
Available Physical Memory   2.26 GB
Total Virtual Memory   7.92 GB
Available Virtual Memory   6.30 GB
Page File Space   3.96 GB
Page File   C:\pagefile.sys