enable google sync in windows registry

make a "log in" script (bat or cmd) with the following line:
reg add HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Google\Chrome /v SyncDisabled /d 0 /t REG_DWORD /f

place it here: C:\Windows\System32\GroupPolicy\User\Scripts\Logon

new task:
create a new task in task scheduler with the trigger starting with an event (id: 4801) or at computer start or user log on.
select the action tab and add the script above.

don't forget the "Run with highest privileges" check box in the general tab.

solve problems with internet conncetivity

e.g. false symbol in windows system tray (!) or red x in network overflow:
http://superuser.com/questions/661976/windows-7-shows-red-x-on-network-icon-but-im-connected

I used this batch file:
ipconfig /release

ipconfig /renew

ipconfig /flushdns
ipconfig /registerdns

hard linked folder (files) with windows

to link a folder to another one "the hard way" (e.g. to link "%AppData%\Local\Google\User Data" to another location) us the cmd and option "mklink /J [fromfolder] [tofolder]"
J = Junction

(for files use /H instead of /J)

adduser to sudo group

adduser <name> sudo

user <name> has to login again for using the sudo command!

mount cdrom

that easy:
mount -t iso9660 /dev/cdrom /media/cdrom