[Q] win7 Cannot detected galaxy note n7000 in any form

my samsung galaxy note n7000 is not getting detected on win7 laptop. Neither it shows MPT/PTP option nor detects through USB mass storage device. Its running samsung build ICS 4.0.4 (not custom ROM).
Ironically, the same gets connected with MTP/PTP and with Mass Storage device on Win7 system in office. Earlier it used to work with win7 laptop but not anymore.
I dont want to factory reset my phone, so any other solution would be appreciated.

Thanks