Recently I've been playing around with a very small 64-bit Windows XP Pro (with SP2). Unfortunately some of the programs I'm used to using on 32-bit XP don't work on it, including Sandboxie. What's the next best thing? I would use it mostly for secure web browsing with Firefox. Note: I know there's a 64-bit version of Sandboxie, but it's only for Vista and Windows 7. (I already tried the latest 64-bit beta and it refused to install). p.s. I installed this Windows on a 2.5 GB partition which is about 2/3 full now. Originally the idea was to convert it into a portable VHD image that I could boot off a USB drive, but I kind of like having this mini-Windows available now from the boot menu since it boots up very fast and can make use of the whole 4 GB of ram available on my laptop. I've installed 64-bit version of Look'n'Stop 2.07 for firewall (private firewall also doesn't run on 64-bit XP), Zemana Antilogger, and IOBit's Malware Fighther (current beta).