Microsoft can notify an individual of any patch or security vulnerability they release. Always test any Windows NT, Service Packs in a lab before applying them on your Production machines. Service Packs need to be reapplied to maintain the security. When reapplying the patch, DO NOT overwrite any newer files. Yes it can.
Memory pages are swapped or paged to disk when an application needs physical memory.
The system has to be rebooted or brought down to clear the page file. Always install virus software, as some types of viruses, such as those written in Java, MS Word scripting language, Excel macros, would play some tricks Windows NT machines. According to DR Solomon, the MS Word based concept virus spread widely in part because several companies, have shipped CD-ROMs containing viruses. I have heard a lot about the Microsoft Security Configuration Editor. Now we can add the Security Configuration Editor as a snap-in to the Microsoft Management Console.