| ? | Updatewiz | updatewiz.exe | ?? |
| N | UPDATE~1 | updatemgr.exe | Once a month, your EarthLink 5.0 Update Manager contacts EarthLink's servers to check for software updates. If an update is available for your EarthLink software, Update Manager will inform you and, with your permission, download and install the update. Can go to http://www.earthlink.net and download the updates manually |
| X | upddateit | winit.exe | Added by the RBOT-MS WORM! |
| X | Updmgr | updmgr.exe | eUniverse/KeenValue adware variant |
| N | UpdReg | Updreg.exe | Reminder to register Creative Labs SoundBlaster Live! cards |
| X | UpdSys | [random filename] | Added by the BJ TROJAN! |
| ? | UPERVGAS | UPERVGAS.exe | ?? |
| X | upme | [filename] | Added by the MUGLY.F WORM! |
| X | UPNPService | WinSVCservice.exe | Added by the AGOBOT.UN WORM! |
| Y | UPS | ups.exe | PowerChute v5.02 - UPS Monitoring Module (which loads iconclnt - the tray icon) |
| Y | UPSentry 2000 | upsd.exe | Used with Belkin UPS (Uninterruptable Power Supply) for support in the event of a power-loss |
| Y | UPSlim | upsd.exe | Used with Belkin UPS (Uninterruptable Power Supply) for support in the event of a power-loss |
| X | UPSUtl | web.exe | CoolWebSearch parasite variant |
| U | Uptimer4 | Uptimer4.exe | Uptimer4 is an appbar which displays time, date, uptime, free ram, free pagefile, cpu usage, disk free space, battery power, IP addresses, TCP throughput, list of running processes, netstat and several more things |
| X | UpToDate | uptodate.exe | BrowserAid/BrowserPal foistware |
| Y | UrlLstCk | UrlLstCk.exe | Part of Norton Internet Security. From Symantec - "UrlLstCk.exe is a necessary file that will be present in C:Program FilesNorton Internet Security. It is a URL Checklist. It should not be disabled" |
| N | URLMAP | Urlmap.exe | Installed by MS Money, and runs whenever you start IE. All it does is bring up an annoying sidebar (kind of like the search window) with 'financial links' when the web page supports it |
| Y | UrtSvcExe | Urt95Svc.exe | "Cisco Secure URT is a virtual LAN (VLAN) assignment service that enhances LAN security by actively identifying and authenticating users and then associating them only to their specific network services and resources" |
| ? | Usb | Usb.exe | HP related - not sure whether it's required |
| X | USB 2.1 Driver | winupdate1.exe | Added by a variant of the RBOT WORM! |
| X | USB controller | Svcmm32.exe | Ouchvideo.com 'n-Lite' spyware |
| X | USB Device | servicelog.exe | Added by the WOOTBOT.CB WORM! |
| X | USB Device | win32usb.exe | Added by the FORBOT-BQ WORM! |
| X | USB Hardware Monitoring | USBhardware.exe | Added by the RBOT-NN WORM! |
| X | USB Host Service | usbsvc.exe | Added by the RBOT-GG WORM! |
| ? | USB Hub Keyboard Patch | SKBPATCH.EXE | USB HUB Update |
| Y | USB SECURITY DEVICE CoInstaller | JupitCo.exe | ButterflyMedia USB Flash drive related - required for the password security feature to work |
| X | UsbD | smss32.exe | Adware downloader - recognized by Kaspersky antivirus as Trojan-Proxy.Win32.Agent.cj |
| X | UsbD | svhost32.exe | Added by the AGENT.IB TROJAN! |
| X | Usbd | usb_d.exe | Added by the CIDRA-A TROJAN! |
| U | USBDetector | USBDetector.exe | USBDetector sets up an icon in the System Tray for a USB card which is intended to be used to eject or unplug hardware |
| ? | USBDetector | UDetect.exe | USB detector, apparently for an MP3 player - any further information appreciated! |
| X | usbdrv | servicetask.exe | Added by a variant of the SDBOT WORM! |
| U | USBMMKBD | usbmmkbd.exe | USB multimedia keyboard for HP systems. Allows the use of special function keys on USB keyboards. The latest version (available here) no longer pings a server when on-line wheras the older version did but did not transmit any user information |
| U | USBMonit.exe | USBMonit.exe | Monitors USB ports for insertion of Sandisk USB flashdrives |
| X | usbn | usbn.exe | Adult content dialer, recognized by Kaspersky antivirus as Trojan-Downloader.Win32.Small.afa |
| Y | USBPNP | USBPNP.exe | SiPix digital camera Twain USB driver |
| N | USBTA | usbtapnp.exe | System Tray access for the BeWAN Gazel 128 USB ISDN adapter |
| X | user | user32.exe | Added by the BINGHE TROJAN! |
| X | User Services | usersvc.exe | Added by the REVCUSS.A TROJAN! |
| X | User23.exe | DIAL.exe | This is a trojan trying to disguise itself as User32.dll |
| X | User32 | [filename] | Added by the NETTRASH TROJAN! |
| N | UserFaultCheck | dumprep 0 -u | Used in connection with memory dumps - you can disable these by - right clicking on My Computer, selecting Properties and then the Advanced tab. Click on the Settings button in 'Startup and Recovery'. In the bottom pane - under 'Write debugging information' - click on the down arrow and then select 'None' - OK your way out |
| X | UserSystem | [filename] | CoolWebSearch SmartSearch variant - also see here |
| X | ushli | sscbltqu.exe | Obtained from an MP3 search list site. Also generates random processes on reboot |
| X | usrgtway.exe | syswrun4x.exe | Added by the MITGLIEDER.E TROJAN! |
| N | USRobotics 802.11g Wireless Network Utility | USRWLANG.exe | USRobotics Wireless Network Utility - used to configure security settings for connecting to WEP encrypted Access Point through the USR Wireless adapter. You must uncheck "Use Windows to configure my wireless settings" for the program to work properly. Has Site Survey capabilities, and reports link quality and signal strength. Not required for proper operation of the device as the features given are accessible in the network connection properties |
| N | Usrobotics Online Registration | ?? | Pop-up reminding customers to register their products online at US Robotics |
| X | Usrr | rncr.exe | PurityScan/Clickspring adware |
| ? | USRSTA | USRSTA.exe | Wireless Card controller. What does it do and is it required? |
| ? | USRSTA.EXE | USRSTA.EXE | Wireless Card controller. What does it do and is it required? |
| N | USSShReg | USSSHREG.EXE | Registration reminder for Ulead SmartSaver Pro - compacts large graphics for web designers |
| ? | Utility Ping | UTILIT~1.EXE | ?? |
| N | UtilityPro | UtilityPro.exe | IE search toolbars as supplied by people such as Yellow Internet and SearchBoss and written by Rawhide Search Solutions |
| Y | UTILsInst | N/A | For Gilat Communications internet satellite systems. Gilat rescue (Satellite system restore). Required if you have this system. Can cause a BSOD (blue screen of death) if left out |
| N | Utopia Angel | Angel.exe | Calculator for the online Utopia game |
| X | uwyrl | uwyrl.exe | Added by the PHEL.A TROJAN! |