Yes...previous drivers must be uninstalled before installing the 14.4 or 14.6. Do a clean install of the 14.4.
If you have issues after installing AMD driver suites, this is one method you can try.
To perform a 'clean install' of AMD graphics drivers:
You should make a system restore point before attempting, just in case
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)
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 Driver Fusion http://treexy.com/ (free version).
Select AMD graphics, analyse and delete all it finds.
Install the new driver suite.
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 *