[Jasmin]

HI,
I use the guest account on our laptop and yesterday this virus or worm blocked the whole guest account, I believe the virus/worm is called win32/ransome. It shows a white page that says Your laptop as been blocked by the cyber crime police due to visiting a non permitted website, or a website containing child porn, or for storing pirated programs etc To unlock the laptop you have to pay a certain amount in ucash. I haven't visited any such sites nor stored pirated stuff. obviously its a scam (did a search on it).

To remove it the only solutions i've found so far are through admin account which i don't have access to nor do i have access to a cd burner so i cant burn any software and try to run them.

When I log onto the guest account the desktop icons disappears after few seconds. I've also tried to access in safe mode but it wont let me get into the guest account without admin password.
How can i remove this virus/worm without having to access the admin account or run any cd?

[Ossian]

You will need safe mode and an admin account. If you don't have one, ask your network admin or (if you are confident) investigate password reset tools to get admin access

Once you have, download MalWareBytes and install / scan in safe mode

(Guest account, by design, does not have suitable permissions)