It looks like the latest driver version for Vista is the 13.12. I would suggest that the first thing to do is, run Windows Update and install the relevent "optional" and 'suggested' updates..there are some netframework and wdm updates there. Then do a clean install of the driver suite.
To perform a 'clean install' of AMD graphics drivers:
1. IMPORTANT: All Windows Updates should be current, including the 'optional/suggested' updates
2. IMPORTANT: Disable all anti-virus/ad blockers/anti-malware/ anti-anything before trying to install
3. IMPORTANT: Netframework is required and must be the latest version. (from Windows Update)
Create a system restore point before, just in case.
Download the drivers for your computer to the desktop. Follow steps 1-5 ( http://support.amd.com/en-us/download ).
Do not use 'auto-detect and install.
Delete existing drivers from your computer:
In computer control panel select 'uninstall a program'
For computers with Intel processors:
Select AMD install manager and choose 'express uninstall all AMD software'
Including the install manager.
For computers with AMD processors:
Select AMD install manager and 'custom uninstall' the graphics drivers and CCC only.
Reboot into 'safe mode'
In safe mode run DDU (uninstaller) http://www.guru3d.com/files_details/display_driver_uninstaller_download.html
Select AMD graphics, analyse and delete all it finds.
Install the new driver suite.
Edit: As noted by BZ the OS and CPU are getting long in the tooth. For an example, if you had Windows 7, you would be using driver version 14.4/14.6.
Intel I7 960 @ 3.87ghz *Intel DX58SO *HIS HD6970 2gb *Corsair TX650M *2x4gb Corsair XMS3 *WD Black 1TB *Windows 7 Home Premium 64bit ***Asus N71Jq laptop *Intel I7 720QM Processor *Mobility Radeon HD5730 1gb *8gb Ram *Windows 7 64bit ** Toshiba P75-A7200 * Intel I7-4700MQ * Windows 8.1 64bit
* A clear conscience is usually a sign of bad memory *