If you are not having performance issues, it's not a good idea to flash the BIOS, if anything goes wrong during the process it could ruin the motherboard forever.
Windows 7 should add all the necessary drivers
for the installation, have a look at device manager after the install completes to see if any drivers need added.
Just do the wipe, after you have copied out
or made back-ups
of the data you need to save to external media, use Step One of this tutorial at the link below to do a wipe (secure erase
) to the entire Hard Disk Drive, running this "clean all" then using the outline in Step Two #2 to create/format and mark Active
a single 100GB partition using diskpart will get you the best possible space to do a clean install
of Windows 7 to; you can always extend
the Windows partition to include the remaining unallocated space on the Hard Disk Drive or create
additional partitions after the installation completes if you choose. SSD / HDD : Optimize for Windows Reinstallation
Be sure to post back with any further questions you may have and to keep us informed.