+\S{faq-rekey}{Question} My SSH-2 session \I{locking up, SSH-2
+sessions}locks up for a few seconds every so often.
+
+Recent versions of PuTTY automatically initiate \i{repeat key
+exchange} once per hour, to improve session security. If your client
+or server machine is slow, you may experience this as a delay of
+anything up to thirty seconds or so.
+
+These \I{delays, in SSH-2 sessions}delays are inconvenient, but they
+are there for your protection. If they really cause you a problem,
+you can choose to turn off periodic rekeying using the \q{Kex}
+configuration panel (see \k{config-ssh-kex}), but be aware that you
+will be sacrificing security for this. (Falling back to SSH-1 would
+also remove the delays, but would lose a \e{lot} more security
+still. We do not recommend it.)
+
+\S{faq-xpwontrun}{Question} PuTTY fails to start up. Windows claims that
+\q{the application configuration is incorrect}.
+
+This is caused by a bug in certain versions of \i{Windows XP} which is
+triggered by PuTTY 0.58. It can be avoided by installing
+Service Pack 2, by using a different version of PuTTY, or by installing
+a special \i{manifest file} alongside the PuTTY executable.
+The
+\W{http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/xp-wont-run}{\q{xp-wont-run}}
+entry in PuTTY's wishlist has more details.
+