Black screen with cursor, safe mode wont load

So, basically the problem with my computer is that when i start windows normally it gives me a black screen with cursor. I searched in this forum and other forums for help but nothing helped. i tried loading in safe mode but it hangs in classpnp.sys, tried restoring, tried recovery options still doesn't work. Also, tried re-installing windows, but when pressing install it would give message on the screen "Setup is starting..." and it just loads, and nothing happens, i gave it an hour or two before i gave up. I am sure the CD is fine because it worked on the same pc before. It is windows ultimate 32 and 64 bit and computer supports both.
I have a Dell computer and it is not old, I bought it like 6months ago. If anyone could help, i would really appreciate it. Thanks

Don't have "Advanced" in BIOS menu
i have the following options:
System Info
Standard CMOS Features
Advanced BIOS Features
Boot Device Configuration
Advanced Chipset Features
Integrated Peripherals
Power Management Setup
Load Defaults
Save and Exit
Exit Without Saving

Intel (R) Pentium (R) D CPU 2.80 GHz

its a Dell brand but not sure which model it is

sorry cant find the model, and its a desktop theres no labels at the bottom of it