"insufficient disk space" when installing amd chipset drivers but there is 3GB space on the drive,
it says it needs 100mb but its still says "insufficient disk space" with error 176.
According to AMD Error 176 you need at least 3GB of Disk space for the installation to continue:
Use Windows "Disk Cleanup" - "SYSTEM FILES" to make more room in your disk. You can also use CCLEANER to make more room on your disk afterwards.
Once you have a minimum of 4GB of Disk space try running the chipset again.