Since you are low on time and do not have a flash drive then I suggest trying one (or more if it doesn't find it, I'd try Kaspersky first) of these boot disks:
These are links to Anti-virus vendors that offer free LiveCD/Rescue CD utilities that are used to boot from in order to repair unbootable or damaged systems, rescue data, and scan the system for malware infections. Keep in mind there is no guarantee the repair will be successful and you may need to try more than one. Burn it as an image to a CD disk to get a bootable CD. All (except Avira) are in the ISO Image file format. Avira uses an EXE that has built-in CD burning capability.
If you are not sure how to burn an image, please read How to write a CD/DVD image or ISO. If you need a FREE utility to burn the ISO image, download and use ImgBurn.
-- Note: In order to use a rescue disk, the boot order must be set to start from the CD-ROM drive. If the CD is not first in the boot order, the computer will attempt to start normally by booting from the hard drive. The boot order is a setting found in the computer’s BIOS which runs when it is first powered on. This setting controls the order that the BIOS uses to look for a boot device from which to load the operating system. The default will normally be A:, C:, CD-ROM. Different computers have different ways to enter the BIOS. If you're not sure how to do this, refer to:
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