@idavini Hey I had the same problem exactly Release Date Check error after getting stuck in 30% even though I was connected to the Internet.I tried multiple things as well Reinstalling, uninstalling over and over downloaded patches, etc and nothing worked, then I saw in a forum to make sure the date was correct in either the bios and the OS.
After entering the request code and the serial number, a window told me that my game was activated and release date checked. I have already un-installed and re-installed and the Manual Activation button still doesn't work and neither does the Internet Activation. I tried multiple things as well Reinstalling, uninstalling over and over downloaded patches, etc and nothing worked, then I saw in a forum to make sure the date was correct in either the bios and the OS.
However, I didn't install the GTA IV Offline Installer after from the same support website, and now when I start Grand Theft Auto 4 it keeps doing a release date check, and whenever I try clicking on the 'Activate Manually' option, nothing happens and I am stuck on the same 'Release Date Check Failure' Window, seemingly forever... So my date was correct but since I had installed GTA IV before with no problems I thought it might be a glitch with the date synchronized server or something, so I changed my Windows date to august 2014 (probably any month and day of 2014 will do) before I installed GTA IV and I didn't have that problem anymore, it asked me for the serial code just like before with no issues at all.
Each friend (and three of the girlfriends) provide special unlockable abilities in return for maintaining good relationships with them.
There are five friends in total, which become available at different times during the storyline.
After installing it, it prompted a 'Release Date Check' window.