Well I ran same forge I always do installed it correctly and got some happy error messages.

 

2013-12-22 12:32:51 [sEVERE] [ForgeModLoader] The following is diagnostic information for developers to review.

2013-12-22 12:32:51 [sEVERE] [ForgeModLoader] Error details

java.lang.RuntimeException: A download error occured

at cpw.mods.fml.relauncher.RelaunchLibraryManager.downloadFile(RelaunchLibraryManager.java:548)

at cpw.mods.fml.relauncher.RelaunchLibraryManager.handleLaunch(RelaunchLibraryManager.java:165)

at cpw.mods.fml.relauncher.FMLRelauncher.setupHome(FMLRelauncher.java:172)

at cpw.mods.fml.relauncher.FMLRelauncher.relaunchApplet(FMLRelauncher.java:259)

at cpw.mods.fml.relauncher.FMLRelauncher.appletEntry(FMLRelauncher.java:229)

at net.minecraft.client.MinecraftApplet.init(MinecraftApplet.java:25)

at net.minecraft.Launcher.replace(Launcher.java:153)

at net.minecraft.Launcher$1.run(Launcher.java:94)

Caused by: java.io.FileNotFoundException: http://files.minecraftforge.net/fmllibs/bcprov-jdk15on-148.jar

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)

at java.lang.reflect.Constructor.newInstance(Unknown Source)

at sun.net.www.protocol.http.HttpURLConnection$6.run(Unknown Source)

at sun.net.www.protocol.http.HttpURLConnection$6.run(Unknown Source)

at java.security.AccessController.doPrivileged(Native Method)

at sun.net.www.protocol.http.HttpURLConnection.getChainedException(Unknown Source)

at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)

at cpw.mods.fml.relauncher.RelaunchLibraryManager.downloadFile(RelaunchLibraryManager.java:532)

... 7 more

Caused by: java.io.FileNotFoundException: http://files.minecraftforge.net/fmllibs/bcprov-jdk15on-148.jar

at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)

at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(Unknown Source)

at java.net.URLConnection.getHeaderFieldLong(Unknown Source)

at java.net.URLConnection.getContentLengthLong(Unknown Source)

at java.net.URLConnection.getContentLength(Unknown Source)

at cpw.mods.fml.relauncher.RelaunchLibraryManager.downloadFile(RelaunchLibraryManager.java:531)

... 7 more

 

I run minecraftforge-universal-1.5.2-7.8.1.737

any ways to fix this "without updating plz"

Read the EAQ.