@angelicfilth, i have the same thing, the message keeps popping up. this happened after i removed limewire with "add/remove programs". as, i now learn, i shouldn't have :s
The limewire folder is still in c/program files, though it's not visible in the program files menu under start. the content of the limewire folder can't be removed, supposably because the item is in use. but i can't stop it either, because ctrl+alt+del seems to have been disabled.
i also tried installing limewire again, but that's impossible because i need to remove the unremovable files first.
awful software. hope someone comes up with a solution to this problem... help!...

to "show you mine":

LimeWire version 4.12.6
Java version 1.6.0_01 from Sun Microsystems Inc.
Windows XP v. 5.1 on x86
Free/total memory: 3027304/4128768
com.limegroup.gnutella.gui.GUILoader$StartupFailed Exception: file [LimeWire.jar] has hash of [0B27FDA0142B4B9559F936A9C3EBBDB8] instead of expected [230136A3E23FE1D848AE9E024838A41E]
at com.limegroup.gnutella.gui.GUILoader.verifyHashes( GUILoader.java:328)
at com.limegroup.gnutella.gui.GUILoader.sanityCheck(G UILoader.java:294)
at com.limegroup.gnutella.gui.GUILoader.load(GUILoade r.java:48)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Nativ e Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknow n Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Un known Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.limegroup.gnutella.gui.Main.main(Main.java:44)
STARTUP ERROR!
-- listing properties --
WINDOW_Y=0
WINDOW_X=0
PORT=19578
TOTAL_CONNECTION_TIME=2732471714
RUN_ON_STARTUP=false
UPDATE_DELAY=252000020
UPDATE_GIVEUP_FACTOR=49
FILTER_HASH_QUERIES=true
INSTALLED=true
UI_LIBRARY_TREE_DIVIDER_LOCATION=156
HARD_MAX_UPLOADS=1
DISABLE_SUPERNODE_MODE=true
_BUGS=true
AVERAGE_UPTIME=24989
TOTAL_UPTIME=6547322
MAX_UPLOAD_BYTES_PER_SEC=29
MIN_CONNECT_TIME=4
CONTENT_AUTHORITIES=fserv1.limewire.com:10000
COUNTRY=
LAST_SHUTDOWN_TIME=1178179296453
APP_WIDTH=1024
SESSIONS=263
UPLOAD_SPEED=25
MINIMIZE_TO_TRAY=false
UPLOADS_PER_PERSON=1
SHARE_DOWNLOADED_FILES_IN_NON_SHARED_DIRECTORIES=f alse
ALLOW_PARTIAL_SHARING=false
LAST_ACCEPTABLE_BUG_VERSION=4.13.3
FRACTIONAL_UPTIME=0.05736808
UPDATE_RETRY_DELAY=1800001
CONNECTION_SPEED=1000
LAST_EXPIRE_TIME=1178114174578
TOTAL_CONNECTIONS=161
DIRECTORY_FOR_SAVING_FILES=C:\Documents and Settings\Bertolt\Shared
UPDATE_DOWNLOAD_DELAY=14400001
MAX_DOWNLOAD_BYTES_PER_SEC=36
RUN_ONCE=true
AVERAGE_CONNECTION_TIME=16971874
APP_HEIGHT=738
EVIL_HOSTS=BearShare 5.2
DAAP_ENABLED=false
FREELOADER_ALLOWED=10
DIRECTORIES_TO_SEARCH_FOR_FILES=C:\Documents and Settings\Bertolt\Shared
MAX_SIM_DOWNLOAD=30
LAST_GWEBCACHE_FETCH_TIME=1166186872671
UNSET_FIREWALLED_FROM_CONNECTBACK=true
FILTER_SPAM_RESULTS=0.86
CLIENT_ID=3737F506F3C839D843D18C53F84C4D00
PLAYER_ENABLED=false
INCOMPLETE_PURGE_TIME=14
PARALLEL_SEARCH=10
CONTENT_MANAGEMENT_ACTIVE=true
FLUSH_DELAY_TIME=25
CHAT_ENABLED=false
CONNECTION_VIEW_ENABLED=true
IDLE_CONNECTIONS=2
IGNORE_ALL_BUGS=true

FILES IN CURRENT DIRECTORY:
C:\Program Files\limewire\COPYING
LAST MODIFIED: 1170106423073
SIZE: 18349
C:\Program Files\limewire\data.ser
LAST MODIFIED: 1170106423339
SIZE: 358
C:\Program Files\limewire\donotremove.htm
LAST MODIFIED: 1170106422682
SIZE: 0
C:\Program Files\limewire\GenericWindowsUtils.dll
LAST MODIFIED: 1170106419698
SIZE: 12279
C:\Program Files\limewire\hashes
LAST MODIFIED: 1170106631792
SIZE: 298
C:\Program Files\limewire\i18n.jar
LAST MODIFIED: 1161974140218
SIZE: 25678
C:\Program Files\limewire\icu4j.jar
LAST MODIFIED: 1161974140281
SIZE: 741440
C:\Program Files\limewire\id3v2.jar
LAST MODIFIED: 1161974140312
SIZE: 94430
C:\Program Files\limewire\install.log
LAST MODIFIED: 1178183029875
SIZE: 2045
C:\Program Files\limewire\jcraft.jar
LAST MODIFIED: 1161974140359
SIZE: 136693
C:\Program Files\limewire\jl011.jar
LAST MODIFIED: 1161974140406
SIZE: 255016
C:\Program Files\limewire\jmdns.jar
LAST MODIFIED: 1161974140593
SIZE: 69306
C:\Program Files\limewire\language.prop
LAST MODIFIED: 1178183028890
SIZE: 4
C:\Program Files\limewire\LimeWire.exe
LAST MODIFIED: 1156261555747
SIZE: 159744
C:\Program Files\limewire\LimeWire.ico
LAST MODIFIED: 1170106421729
SIZE: 92854
C:\Program Files\limewire\LimeWire.jar
LAST MODIFIED: 1161974138421
SIZE: 7117582
C:\Program Files\limewire\LimeWire.jar.tmp
LAST MODIFIED: 1178183032375
SIZE: 7174700
C:\Program Files\limewire\LimeWire20.dll
LAST MODIFIED: 1170106420807
SIZE: 40960
C:\Program Files\limewire\log4j.jar
LAST MODIFIED: 1161974140687
SIZE: 677952
C:\Program Files\limewire\log4j.properties
LAST MODIFIED: 1170106423495
SIZE: 7171
C:\Program Files\limewire\looks.jar
LAST MODIFIED: 1161974140765
SIZE: 630634
C:\Program Files\limewire\MessagesBundle.properties
LAST MODIFIED: 1170106410307
SIZE: 114566
C:\Program Files\limewire\MessagesBundles.jar
LAST MODIFIED: 1161974139640
SIZE: 2951044
C:\Program Files\limewire\mp3sp14.jar
LAST MODIFIED: 1161974140781
SIZE: 40064
C:\Program Files\limewire\PackedJars.7z
LAST MODIFIED: 1170106556245
SIZE: 2315955
C:\Program Files\limewire\pmf.ico
LAST MODIFIED: 1170106422807
SIZE: 3262
C:\Program Files\limewire\ProgressTabs.jar
LAST MODIFIED: 1161974139671
SIZE: 5786
C:\Program Files\limewire\root
LAST MODIFIED: 1178183028875
SIZE: 0
C:\Program Files\limewire\SOURCE
LAST MODIFIED: 1170106423198
SIZE: 268
C:\Program Files\limewire\spacer.gif
LAST MODIFIED: 1170106424417
SIZE: 49
C:\Program Files\limewire\themes.jar
LAST MODIFIED: 1161974140812
SIZE: 620179
C:\Program Files\limewire\tritonus.jar
LAST MODIFIED: 1161974140843
SIZE: 152711
C:\Program Files\limewire\unpack.log
LAST MODIFIED: 1178183032375
SIZE: 587
C:\Program Files\limewire\UnpackedJars.7z
LAST MODIFIED: 1178183044000
SIZE: 3762034
C:\Program Files\limewire\unpackedJars.tmp
LAST MODIFIED: 1178183045281
SIZE: 17529522
C:\Program Files\limewire\update.ver
LAST MODIFIED: 1170106418729
SIZE: 3810
C:\Program Files\limewire\vorbis.jar
LAST MODIFIED: 1161974140859
SIZE: 27215
C:\Program Files\limewire\WindowsFirewall.dll
LAST MODIFIED: 1170106420964
SIZE: 61440
C:\Program Files\limewire\WindowsV5PlusUtils.dll
LAST MODIFIED: 1170106421104
SIZE: 12808
C:\Program Files\limewire\xerces.jar
LAST MODIFIED: 1161974141046
SIZE: 2147687
C:\Program Files\limewire\xml-apis.jar
LAST MODIFIED: 1161974141078
SIZE: 207655
C:\Program Files\limewire\xml.war
LAST MODIFIED: 1170106419432
SIZE: 8423