Hi umer! Welcome to the Windows 7 Forums website!
That is a rather old system you have, probably about 6 years or so and uses a Celeron CPU along with an Intel 915GV Express chipset with Integrated Intel Graphics Media Accelerator 900.
From the Intel website:
Windows 7* drivers are
not available for the following older Intel® graphics controllers:
- Mobile Intel® 915GM/GMS, 910GML Express Chipset Family
- Intel® 82915G/82910GL Express Chipset Family
- Intel® 82865G Graphics Controller
- Intel® 82852/82855 Graphics Controller
- Intel® 82845G Graphics Controller
- Intel® 82830M Graphics Controller
- Intel® 82815 Graphics Controller
- Intel® 82810 Graphics Controller
The Microsoft Windows 7* operating system (OS) supports two different graphics driver models: the Windows* Display Driver Model (WDDM 1.0 & 1.1) and the older Windows* XP Driver Model (XPDM). WDDM drivers provide the 3D graphical user interface experience to users. XPDM drivers provide an interface that visually resembles the Windows XP user interface and do not support Windows 7 OS premium features such as the Microsoft Aero* user interface.
Only XPDM drivers** are available for the following older Intel® graphics controllers:
- Mobile Intel® 915GM/GMS, 910GML Express Chipset Family
- Intel® 82915G/82910GL Express Chipset Family
- Intel® 82865G Graphics Controller
- Intel® 82852/82855 Graphics Controller
- Intel® 82845G Graphics Controller
- Intel® 82830M Graphics Controller
- Intel® 82815 Graphics Controller
- Intel® 82810 Graphics Controller
You can do whatever regarding switching back to XP if you want. Either that or building a new system with up to date hardware.
Good luck in whichever way you go!
~Nibs