Hi Aaryan, Flow Simualation and the HVAC module are separately licensed products. You have to purchase a license for them before you can use them.
When you were installing them, did you put a serial number in for those products? Typically this will be a different serial number from your SolidWorks serial number.
Yeah...while installing I had put serial number in for those products thus it shows check mark in front of them in 'my product ' session ,but while using SW they appear in faint color and I am unable to start them ....pls help!!!
I think it could be related to this:
Please follow the procedure described by Ron Chappel and in case of a 64bit machine, add a "32bit DWORD value"
Btw, be carefull if you're not familiar with Windows registry, make a backup, restore point etc.