In August last year my WINXP PC gave out and I replaced it knowing that my scanner would now be obsolete. I used Vuescan trial software and screen capture to avoid the watermarks until you paid. I figured the cost of the Vuescan was better invested in a new compatible scanner. Did I mention I'm very poor.. and also tightfisted. Later after a suggestion of a way to sidestep the payment, I was able to use the Vuescan software completely. I was disappointed to say the least. All the images were soo soft and lacked crispness and needed a lot of massaging to be presentable. Oh I forgot to mention WinXP emulation via Virtualware and dual-boot options were considered, but as too time intensive at my advanced age. Well more than a year has passed and I just bought a used V500. A sigh of relief as this does basically what it's supposed to do and I now blame all bad things on me instead of the scanner. I've read a bit about SilverFast and now realize it is a scanning software. I imagined it as something for post-processing. The biggest advantage was cleaning dust... I now did a perfunctory romp around the net and see that the V4990 is listed but the V500 is not. I suspect it is compatible as these scanners have the same hardware ..or so I've been told. Many of you have praised Vuescan, but little is said of Silverfast. I was hoping somebody would give some feedback on this... AS best I can tell for circa 49,00 Euro the basic edition can be had. One of the five or six features that "full/er" versions offer is multi-exposure. I assume this is related to supporting multiple negs on a strip ...important to speeding up workflow... So anybody want to chime in on this and say if you prefer the included drivers or working with third party options have improved your experience I would like to know!