No idea what causes it. I was previously on 1.8.9, but since Thermal Dynamics isn't updated yet (and thus Buildcraft isn't usable with IC2) I decided to start a 1.7.10 account.
On an empty folder apart from forge-1.7.10-10.13.4.1448-1.7.10 and the IC in the title, I get a crash.
Sadly there seems to be no way to get the crash report on here, as its too long and I cannot get a .doc file goin (I don't know why, ask microsoft).
EDIT thanks for suggesting pastebin, here is the link to the crash report: http://pastebin.com/2v7JsTDW
This is launched with solely industrialcraft installed, like mentioned above.