Dean, this is the link for the All in 1 driver you need for Windows 7 based on the board you stated.
http://66.226.78.21/downloadsite/drivers/AMD/Allin1/Allin1_Win7-64_Win7_Vista64_Vista_XP64_XP(v12.3).zip
Just unzip and run the 'Setup' file. Just carefully follow any prompts but should be straight forward.
For now, I wouldn't worry about any Bios updates as these need to be done very carefully. Just work on getting your drivers installed, windows updates, and software. If you have been experiencing mouse issues, see if there is any updated drivers for your mouse from the manufactures website. If you continue to have mouse issues after all your system updates are done, then look at the bios.
And lastly, don't forget to boot up off of your new drive that has the fresh Windows install BEFORE running all these updates.
Again, good luck.