Hello everyone, this is surojit, from india. Please help me to solve my problem with my win 7 pc. I'm using a 64bit ultimate version. Now, whenever i try to install any pc game or software, like cpuz or even firefox, i keep getting the error that the ' set up files are corrupted, please obtain a new copy of the programme...' . This is happening with few games/software which i installed before also, so i assume that the setup files are,as said by the pc, not corrupted. Please help to solve this problem. I did a fresh installation of the os yesterday, but still the problem is same as ever.thanking you all for reading this. 
My Computer
At a glance
Windows 7 ultimate x64Pentium(R) Dual-Core CPU E5500 @ 2.80GHz, 280...2GBati radeon 5450
- Computer type
- PC/Desktop
- Computer Manufacturer/Model Number
- custom build
- OS
- Windows 7 ultimate x64
- CPU
- Pentium(R) Dual-Core CPU E5500 @ 2.80GHz, 2800 Mhz, 2
- Motherboard
- asus
- Memory
- 2GB
- Graphics Card(s)
- ati radeon 5450
- Hard Drives
- seagate 250GB
- Antivirus
- Norton
- Browser
- Chrome