i want uninstall my visio professional 2010, and then use license on other PC. could i do that? 

Yes.

Visio is available as FPP (Full Packaged Product) and the FPP license agreement permits you to transfer (move) from one PC to another PC (you must uninstall from one PC to use on another PC)

What are the steps involved to transfer the license? The laptop which Viso is currently loaded on is having disk issues and is struggling to stay running.

What are the steps involved to transfer the license? The laptop which Viso is currently loaded on is having disk issues and is struggling to stay running.

Hi,

if your license is of the type "FPP", the license agreement/terms permits you to transfer it to another pc.
The steps involved, are;
a) remove from the current PC
b) install to the new PC
c) activate the product license on the new PC
NB: automatic activation via internet may not succeed. if so, call MS Activation Center and explain the situation
http://support.microsoft.com/kb/950929/en-