From eScan Wiki
Q. I have installed eScan on my Laptops. Now my Laptop never does a clean shutdown! It just seems to wait indefinitely.What could be done?
A. When you shutdown your machine, eScan checks your floppy drive to see if a floppy has been accidently left & if so, checks the floppy's boot-sector for viruses. This check could be causing the problem.
To disable the check, go to eScan folder, edit the eupdate.ini file, set CheckFloppyOnReboot=0 and reset the PC after saving the file. This should solve your problem.