if i remember correctly EFS is based on certificates if i am not mistaken
you could actually go around EFS in windows xp but not anymore in vista and above...
next time backup your personal EFS cert and you should be able to decrypt these files
System Manufacturer/Model Number Tx2500z Tablet Pc/Homemade Server OS Windows 7 Ult x64(x2), HomePrem x32(x4), Server 08 (+VM), 08 R2 (VM) , SuSe 11.2 (VM), XP 32 (VM) CPU Turion X2 ultra (oh well came with laptop)/P4 @3.2 (yes P4) Motherboard IDK HP Motherboard / Intel DG965SS Memory OCZ Dual Channel 4GB kit/ 1gb Dual Channel Graphics Card HD 3200 graphics /GMA x3100 (yay for intergrated!!) Sound Card Realtek HD Audio(mic working, well sort of)/Siig IC-70012 Monitor(s) Displays built-in Hp 12" laptop screen/ Acer 19" Screen Resolution 1280x800 /1440x900
Mouse Logi MX Rev. /MS Wheel Optical 1.1A /Logitech Optical Mouse Cooling All Air Cooled Internet Speed College baby but its still routed through vpn to 1536k... Other Info love my wacom pen and pressure sensitivity...
wished it worked in 7, SUSE for that matter though