pixering :
1. No USB issues, though one of my webcams is also not installing (it's a cheap one with no available drivers online)
2. Could not find any other mouse drivers.
3. Tried Intellimouse and Microsoft Mouse softwares, but neither can detect a "Microsoft device".
4.I tried changing USB ports, but it only caused the same issue as at startup (i.e. the cursor won't show and there's a driver error)
5.Nope, but I'll check
6.No installation disk
1. Inconclusive
2. OK, meant to say drivers with a PS/2 adapter.. USB mice only need the default USB driver.
3. Same as 2.
4. Inconclusive. You need to try option 5
5. You'll need to test the mouse with a PS/2 adapter or try it on another computer to know if it works correctly and it is not the issue.
6. You may want to download a RC Windows 8 ISO from an official download site.. or borrow a friends or family member/relative so you can try and repair possible missing or corrupt system files. There's a chance an RC version may not work on your system but that's one possible solution.
The bolded text option is the best I can think of so you can use the mouse as PS/2 while you find the solution for USB use, or just to determine which is the issue, mouse or USB ports.
CORRECTION: I had completely missed "wireless" and "bluetooth".. so the PS/2 adapter thing will probably not work, so better scrapp all I've said up to this point... you may want to start another thread for better chances of finding help. I'm honestly too green when it comes to bluetooth but what I do know is you have to enable bluetooth in Windows so if your mouse has worked before restoring the system may help.. if it's a new installation, you may have to yet start downloading windows updates before the driver can be correctly installed.
Try this Microsoft Fix-it for Windows Vista... couldn't find one for Windows 8 but it may apply as well for W8. Or see if doing it manually helps..
Troubleshoot problems with Bluetooth enabled devices
http://windows.microsoft.com/en-us/windows-vista/troubleshoot-problems-with-bluetooth-enabled-devices
Add Bluetooth Devices In Windows 8 Without Installing 3rd Party Software Or Drivers
http://www.addictivetips.com/windows-tips/forget-bluetooth-driver-for-windows-8-connect-manage-devices-easily/