Ah well, maybe it'll come around again. I'll have to check to see what freeware suggestions were made.
FWIW I wouldn't lose sleep over missing RestoreIT, though you still might want to check to see if it didn't install the FarMntIo.sys, HCDisk.sys, & VvBackd5.sys drivers -- at least one of those can get installed before you even see the setup dialog window.
RestoreIT creates a pseudo virtual drive made up of individual 2 GB *.RIT files that according to the manual lose their content if you *look* at the partition where they're stored with an OS that doesn't have RestoreIT installed. You create a system snapshot, which is a full backup to that pseudo virtual drive -- the idea as I understand it is RestoreIT then performs incremental backups, recording anything that changes from that snapshot.
Personally, & totally FWIW, I don't like this sort of app [moreso when not implemented well IMHO like this GOTD], because overall they're inefficient at what they do [why store everything rather than just changes?], & because while RestoreIT for example works like a Windows Undo button, it doesn't provide any of the other benefits you'll get from using other safety or backup methods.
One way to go about it is to perform regular disk/partition image backups -- if you want to minimize the time & disk space it takes, when you setup your system install your software to a 2nd partition as possible, keeping the used portion of the system [Windows] partition small. You can also have more than 1 OS installed -- using the 1st to restore the 2nd is in my experience faster than using most any bootable disc/USB device... to me this is 1 reason to keep your old version of Windows when you upgrade, e.g. XP or Vista to win7. Note however you'll probably still want to have a method of restoring the disk from a boot CD or USB stick etc., both in case that 1st OS becomes damaged & in case malware effects the Master Boot Record. Some people prefer something like Paragon's system backup that they have available stand-alone or as part of one of their other apps -- the main differences you'll see are it works in the background automatically, & it adds the same sort of restore program you'd burn to CD to your hard drive, so you can restore a backup from a boot menu.
Using virtual drives/partitions OTOH may be the fastest way to try something out & put things back afterwards -- they can also provide an extra measure of safety &/or security [e.g. Truecrypt]. Since a virtual disk is just a single file, it can be copied over to restore it, cleared to get rid of contents/changes. Returnil is one app that's always been popular with some GOTD folks, where everything you do is written to a virtual drive rather than your real Windows system - Wondershare's TimeFreeze is a lighter weight alternative that works more-or-less the same way, with all changes either written to your real drive/partition or lost on re-boot. Sandboxie is another, basically similar alternative, & several companies like Dell KASE have system &/or app virtualization products. [Note that we *may* see several new virtualization products as VMWare, perhaps the VM leader, has just priced themselves beyond the reach of many businesses.] Virtual Machines use an OS installed to a virtual disk, let you switch between your regular OS [Windows] & the VM, & can be easier to work with & restore, but they use fake hardware so aren't suitable for everything, e.g. games needing D3D. Installing Windows & software to a bootable virtual disk [*.vhd] works with the win7 boot loader [a free app called EasyBCD can help a lot], but while you can use real hardware, you can only be in one OS at a time, unlike with VMs. Windows 7 VPC has a neat option, where the VM itself can use a 2nd virtual drive much like Returnil & TimeFreeze do -- when you enable Undo Disks all changes are written to an automatically created 2nd virtual drive that you can clear, merge, or keep using as is.