A standard synchronizing program will not work if NTP (Network Time Protocol) is suppressed by a proxy or a firewall.
This synchronizer uses plain access to WWW pages that show standard GMT time. It will work if you have access to Internet Web pages.
The unique Time Offset feature of the program allows setting up your PC clock to gain or to lose for a specified interval. Many our users value this feature greatly. Clock in your PC needs to be corrected only several times a month. And it is this fact that defines the way the program works: the program runs when Windows starts, checks whether synchronization has been done this day already, and stops immediately if so. Otherwise the program checks for Internet connection, then tries to synchronize your clock and ends its work if succeeded. So as you see mostly the program is idle and is not wasting resources of your PC. Synchronization is done automatically while you are receiving your e-mail or surfing the web and no actions are to be done by you. The program uses three different time sources.

0S Non-Proxy Atomic Sync is the Shareware version. The full version can be purchased by clicking on the "CLICK HERE TO ORDER" button below for around 10USD.