Thanks for all your suggestions,
I have found free editions of antivirus useless. I have used Kaspersky. It is quite good. This thing with Quick heal - has been noticed only in one system. The other systems in our office didnot show any such peculiarity.
I think the problem lies some where else.
Kindly help me exploring the actual problem.
Thanks in advance.
My self experience with Free versions of AVG and avast! are great.
Not only did they
block,quarantined and erased realtime threats(YOU HAVE TO CONFIGURE RESIDENT SHIELD AND SCANNER PROPERLY),but they didn't also use too much of resources UNLIKE Norton,McAfee,Quick Heal,etc. paid ant-virus software tools.
Paid anti-virus software tools are definitely a complete PACKAGE in itself(Internet Suite),which is much better and effective,but that does not mean free antivirus software tools as USELESS or TRASH.
Ultimately your choice...