[RTTY] Deleting Prolific USB to Serial Bridge

[KC4HW/Jim]

Wonder if someone might be able to help here.  

Using a Windows 7/32 (Home Premium) operating system.

I have recently purchased a Rosehill 4-port PCI-e Serial Card.  It 
appears that it installed itself without any difficulty.  It gave four 
comports and assigned Com11, Com12, Com5 and Com5 for the last 
one.  I don't know where they are right now.  

The "Properties" for each of these comports allows you to designate 
the Com indenity to Com1 thru Com(very high number).  In the 
process of trying to change the Com designator.  I discovered that 
Com2, Com3 and Com4 were "(in use)" and could not be to select as 
a Com number/designator. 

I previously had installed a Prolific PL-2303 driver, USB to Serial 
Bridge devices on this computer.  Additionally, I had installed another 
such device but don't remember the Brand.  Nevertheless, I used 
these for RigControl and CW/RTTY keying.  Designating Com2, Com3 
and Com4 for these functions in Writelog and N1MM. 

So here is the question....

I am not using those devices any longer, so if I remove the PL-2303 
driver will that release those comports and/or make them available for 
use? 

If you don't think deleting the driver will release these comports, do you 
have a suggestion for releasing those comport number/designator for 
future use?

Thank in advance for any help that is provided.  I am not a computer 
guru by any stretch of the imagination.   So the only help that I can get 
is through the RTTY or WRITELOG reflectors, thought I would try here 
first.

thanks!  

Jim/KC4HW