I recently ran into some trouble since i accidentally downloaded something wrong. I fully removed this virus through all kinds of anti-viruses but just to make sure i formated my pc through windows clean installation disk since i don't have much files i use anyway and i thought it would be nice to make it 'fresh' again. So i inserted my windows 7 home premium installation disk and set it as priority in the BIOS. The installation went fine just ran into some little stuff like windows cannot download on this disk. I fixed that through some googling and with the help of cmd and it started downloading and it even fully completed. But when i reboot after it fully completed and should boot up windows 7 it says "reboot and select proper boot device or insert media in selected boot device and press a key." I tried to set my Hard disk as priority again since people on the net said that could be the problem for others but that didn't fix it. Now the problem is this. I don't have the installation disk of my msi drivers anymore i've lost it somewhere. I thought that might be the problem since it's quite logical if i formated everything on my pc. So i put it on my USB, the msi drivers for my motherboard, the A78M E35 all of the drivers and bios. But whenever i try to set it as priority or even re-do my installation to browse my drivers pre installation "i just get an error that A required CD/DVD driver is missing" So basicly it doesn't recognize the files on my usb, the drivers i put on there instead of my msi disk which i've lost. It's inserted in a 2.0 port everytime and i've tried various methods to get it detecting nothing worked so any solutions please? So basicly i think the only thing that's downloaded on my pc or the only thing i have access to is the windows 7 home premium x64 installation cd which downloads perfectly fine but at reboot i get this problem/error. Is it even true if i get the msi drivers downloaded or find the cd this problem will be solved can someone shed some light on this topic and tell me what the problem could be or what i should do. Sorry for the poor formatting stuck on various problems with this clean installation for 3 days. Getting one step further everytime by fixing one error or one problem by googling for hours and hours till midnight and then just ending stuck. Tried literally every possibility and now i simply have no other clue other than spend my time to just find the disk. Thank you in advance.